Patents Examined by Ralph S. Kendall
  • Process and apparatus for coating one side of a metal strip with molten metal
    Patent number: 4239817
    Abstract: A process and apparatus for coating only one side of a metal strip with a molten metal, by continuously conveying a cleaned and heated strip of metal through a protective gas atmosphere above the level of a melting bath of the molten metal. The metal strip is supported on a reverse side thereof in the area of contact with the molten metal, and with the obverse side of the strip out of contact with the bath itself. The molten metal is conveyed by means of a scoop roller towards the supported area of the strip and only the scoop roller is immersed in the melting bath and only for a part of its surface area.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: December 16, 1980
    Assignee: Thyssen Aktiengesellschaft vorm. August Thyssen-Hutte
    Inventors: Joachim Koenitzer, Heinrich Schmitz, Kurt Jindra
  • Zinc alloy and galvanization process
    Patent number: 4238532
    Abstract: An alloy suitable for the galvanization of steels by an immersion galvanization process, including gavanization of steels containing silicon, which alloy comprises zinc of commercial purity and has a lead content of the order of 1000 to 20000 p.p.m. by weight, an aluminium content of from 100 to 5000 p.p.m. by weight, a magnesium content of from 10 to 1000 p.p.m. by weight and a tin content of from 300 to 20000 p.p.m. by weight.A galvanization process using the said alloy is also described.
    Type: Grant
    Filed: April 10, 1979
    Date of Patent: December 9, 1980
    Inventor: Noel Dreulle
  • Process for dyeing zinc and zinc alloys
    Patent number: 4238250
    Abstract: A multi-colored decorative zinc or zinc alloy having locally organic dyestuff-dyed portions in multi-color is prepared by (1) dyeing with a dyestuff zinc or zinc alloy having a dyeable chromate film bonded thereonto, (2) polishing locally the dyed surface of zinc or zinc alloy, (3) making the chromate film on the exposed surface, (4) dyeing with another dyestuff having a different color the chromate film on the exposed surface, and then the steps (2), (3) and (4) may successively be repeated.
    Type: Grant
    Filed: March 7, 1979
    Date of Patent: December 9, 1980
    Assignee: Mitsui Mining & Smelting Co., Ltd.
    Inventors: Nobuyoshi Kasahara, Koutarou Nonomura
  • Wear resistant titanium alloy coating
    Patent number: 4236940
    Abstract: The adherence and wear resistance of chromium alloy electroplates on titanium is improved by pretreating the substrate to form a chromium conversion coating, and post-treating the substrate at a temperature at about 700-820.degree. C. (1300-1500.degree. F.) for about 1-300 hours. The pretreatment is comprised of the formation of a chromium conversion coating from an acid chromate solution; a preferred solution is comprised of hydrofluoric acid, sodium chromate, and water. The post treatment causes diffusion sufficient to obtain a bond but avoids completely interdiffusing the chromium alloy electroplate, to preserve the wear resistance of the electroplate surface.
    Type: Grant
    Filed: June 12, 1979
    Date of Patent: December 2, 1980
    Assignee: United Technologies Corporation
    Inventors: Brian A. Manty, Herbert R. Liss, Henry Lada
  • Zinc plated steel plate and can produced from the same
    Patent number: 4237192
    Abstract: This invention relates to a zinc plated steel plate, at least one side surface of which is substantially free from oxides and coated with an anti-rust film, and a can produced from said zinc plated steel plate having an interlocking seam joint bonded by soldering techniques.
    Type: Grant
    Filed: January 30, 1979
    Date of Patent: December 2, 1980
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Takehiko Ito, Yusuke Hirose, Hideaki Ishida
  • Improved galvanizing method [and apparatus]
    Patent number: 4237154
    Abstract: Articles of almost any imaginable configuration are given a uniform, complete coating over all surfaces by placing them in a spinnable perforate container or basket that is suspended from a reversible spinning assembly which is adapted to spin the perforate container and its articles in both directions during steps of the process of pre-coating, coating, quenching or air drying.A new control system is also employed to provide rapid response in reversing directions of rotation of the perforated container or bringing it to a complete stop.
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: December 2, 1980
    Inventor: William H. Garrison
  • Producing printed circuits by conjoining metal powder images
    Patent number: 4234626
    Abstract: By the process of this invention, printed circuits are prepared containing an electrically conductive wiring trace from materials having adherent and non-adherent surface areas, e.g., printed circuit substrates bearing an imaged photoadhesive layer. Onto the adherent surface areas of the material are applied ductile metal or alloy particles, and any excess particles are removed from the non-adherent areas. The metallized areas are conjoined, e.g., with silicon carbide brush or rounded metal rod. The conjoined areas can be electrolessly plated, electroplated or soldered. Multilayer printed circuits can also be prepared by repeating these steps with additional layers of photoadhesive material adhered to underlying printed circuits.
    Type: Grant
    Filed: February 1, 1978
    Date of Patent: November 18, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert W. Peiffer
  • Phosphatization of steel surfaces and metal-coated surfaces
    Patent number: 4233088
    Abstract: A process for inhibiting corrosion and providing a foundation for subsequent application of organic coating systems to metal surfaces, such as steel surfaces and zinc-, lead-, copper- and tin-coated surfaces, comprises the development of a protective phosphatizing reaction coating based on a metal other than the metal which is to be protected either by an immersion treatment or by a spray treatment with a phosphatizing bath which contains the metal phosphate or metal acid phosphate matter for such a treatment in a status nascendi.
    Type: Grant
    Filed: March 29, 1979
    Date of Patent: November 11, 1980
    Assignee: International Lead Zinc Research Organization, Inc.
    Inventor: Max Kronstein
  • Method for providing a diffusion barrier
    Patent number: 4233086
    Abstract: A method for providing a barrier against copper diffusion into a zirconium alloy tube which is lined with copper for the purpose of increasing the resistance of the tube to stress corrosion induced by fission products when the tube is used to fuel a nuclear reactor. The method involves the deposition of a copper lining on the zirconium alloy tube and the subsequent exposure of the lined tube to a substance such as steam, water, nickel oxide or carbon dioxide or another material which has the ability to oxidize the zirconium without oxidizing the copper. Thus, a zirconium oxide layer is developed between the zirconium alloy tube and the copper lining thereon.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: November 11, 1980
    Assignee: AB Asea-Atom
    Inventor: Gunnar Vesterlund
  • Phosphate coating process
    Patent number: 4233087
    Abstract: A continuous process for coating ferrous or zinciferous metal substrates using an acidic coating solution of zinc phosphate in the presence of hydrogen peroxide wherein (a) the molar ratio ortho phosphate/zinc in solution is maintained in the range 0.5-3.7, and (b) the coating solution is replenished with hydrogen peroxide, replenishment feed (i) (comprising zinc, ortho phosphate and anion N.sup.n-), and replenishment feed (ii) (comprising alkali), the ratio of the quantities of (i) and (ii) being defined. The acid H.sub.n N has a pK.sub.a value not greater than 3.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: November 11, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventor: Brian A. Cooke
  • Chemical vapor deposition reactor and process
    Patent number: 4232063
    Abstract: Apparatus and process for depositing materials such as Si.sub.3 N.sub.4 and SiO.sub.2 on semiconductor wafers in a hot-wall reactor. A perforated distribution tube is positioned in the reaction chamber, and the wafers are placed inside the tube. Reactant gases are introduced into the chamber outside the tube and pass to the wafers through the openings in the tube.
    Type: Grant
    Filed: November 14, 1978
    Date of Patent: November 4, 1980
    Assignee: Applied Materials, Inc.
    Inventors: Richard S. Rosler, Robert W. East
  • Dual blade coater
    Patent number: 4231318
    Abstract: A dual blade fountain coater for simultaneously coating the opposite sides of a moving web of paper includes a pair of oppositely positioned, non-contacting fountains and a pair of oppositely positioned metering blade assemblies which are mounted for movement about a common transverse pivot axis, which pivot axis is substantially coincidental with the blade contacting region on the web. Each assembly is independently adjustable of the other for adjusting blade angle and each fountain is similarly independently adjustable for varying the coating contacting region and dwell time. Metering bars may be mounted on the blades.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: November 4, 1980
    Assignee: The Black Clawson Company
    Inventor: Stanley C. Zink
  • Surface treatment of metal strip
    Patent number: 4231812
    Abstract: Metal strip, particularly steel strip, is heated to above 250.degree. C. and quenched in a phosphating bath, at 80.degree. C. or more, containing one or more phosphates of the type Me (H.sub.2 PO.sub.4).sub.n, where Me=Zn, Ni, Mn, or an alkali metal, at a concentration of 1 to 20 g/l.
    Type: Grant
    Filed: March 13, 1979
    Date of Patent: November 4, 1980
    Assignee: Centre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie
    Inventors: Philippe Paulus, Jules Hancart
  • Method of preparing a cathode electrocatalyst
    Patent number: 4231813
    Abstract: Disclosed is an electrode having a substrate with an elecrically active surface film. The film has a relatively imporous, dense portion in contact with the substrate and containing cobalt, tungsten, and phosphorous, and a less dense, more porous portion containing oxycompounds of cobalt. Also disclosed is a method of preparing the electrode by electroless deposition of cobalt, tungsten, and phosphorous onto a metallic substrate and heating of the substrate in the presence of oxygen to a temperature and for a time sufficient to form filament-like cobalt oxycompound elements extending outwardly from the surface of the film.
    Type: Grant
    Filed: May 24, 1979
    Date of Patent: November 4, 1980
    Assignee: PPG Industries, Inc.
    Inventor: William W. Carlin
  • Method for manufacturing subminiature quartz crystal vibrator
    Patent number: 4232109
    Abstract: In a flexural mode quartz crystal vibrator formed from a thin quartz crystal plate, a subminiature quartz crystal vibrator characterized in that said quartz crystal plate is obtained by rotating an X-cut plate around the X-axis by an angle of 0 to 10.degree. and further rotating the same by an angle of 70 to 90.degree. around the Y'-axis, the vibrator having a thickness of less than 0.2 mm as fomed by a photolithographic technique, exciting electrodes being deposited on the sides thereof.
    Type: Grant
    Filed: February 14, 1979
    Date of Patent: November 4, 1980
    Assignee: Citizen Watch Co., Ltd.
    Inventor: Shigeru Kizaki
  • Method for sulfurizing cast iron
    Patent number: 4230507
    Abstract: Cast iron is pretreated in an aqueous solution of nitric acid and then immersed in molten sulfur until a sulfurized layer is formed on its surface. The sulfurized layer is very thick and stable and has excellent molten aluminum resistance. Its uniformity is further improved by a subsequent diffusion treatment at elevated temperatures.
    Type: Grant
    Filed: May 22, 1979
    Date of Patent: October 28, 1980
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Mikio Obayashi, Naoyoshi Watanabe
  • Composite conductive structures in integrated circuits
    Patent number: 4228212
    Abstract: A composite conductive structure in integrated circuit devices is described. The composite conductive structure includes an insulating substrate on which is provided a conductor of a refractory metal substantially nonreactive with silicon dioxide. A layer of a silicide of the refractory metal covers the conductor and a layer of silicon dioxide covers the layer of the silicide. A method of making such structures is also described.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: October 14, 1980
    Assignee: General Electric Company
    Inventors: Dale M. Brown, Marvin Garfinkel
  • No-rinse pre-paint coating composition and method
    Patent number: 4227946
    Abstract: An acid aqueous coating composition and concentrate of chromic acid and chromium phosphate derived from phosphoric acid resulting from the oxidation of hypophosphorous acid in reacting with the chromic acid. The chromic acid is present in a stoichiometrically equivalent amount from about one percent to about one hundred percent over that needed to oxidize hypophosphorous acid to phosphoric acid. The composition may also contain a non-foaming wetting agent and particulate silica.
    Type: Grant
    Filed: February 9, 1979
    Date of Patent: October 14, 1980
    Assignee: Oakite Products, Inc.
    Inventor: Stanley C. Williamson
  • Methods of making composite conductive structures in integrated circuits
    Patent number: 4227944
    Abstract: A method of making a composite conductive structure is described. The structure includes an insulating substrate on which is provided a conductor of a refractory metal substantially nonreactive with silicon dioxide covered by a layer of a silicide of the refractory metal and a layer of silicon dioxide. The method includes depositing a layer of polycrystalline silicon over the conductor and the insulating substrate, reacting the layer of polycrystalline silicon with the conductor to form a refractory metal silicide, removing the unreacted portion of the layer of polycrystalline silicon, and then oxidizing the exposed surface of the refractory metal silicide into a layer of silicon dioxide.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: October 14, 1980
    Assignee: General Electric Company
    Inventors: Dale M. Brown, Tat-Sing P. Chow, James F. Gibbons, Paul A. McConnelee
  • Method of forming aluminum coating layer on ferrous base alloy workpiece
    Patent number: 4228203
    Abstract: The disclosure relates to a method of forming aluminum coating layer on surface of a ferrous base alloy workpiece which includes the steps of applying onto the surface of the ferrous base alloy workpiece a coating solution containing 50 to 90% by weight of aluminum or aluminum alloy particles and 10 to 50% by weight of synthetic resin having a high decomposition burning temperature with slow burning speed and being soluble in a solvent at normal temperature, with subsequent drying to form a resin coating layer containing aluminum on the surface of the ferrous base alloy workpiece, and then subjecting the workpiece thus treated to heating up to temperature higher than melting point of the aluminum or aluminum alloy particles so as to form an Al plated coating layer on the surface of the ferrous base alloy workpiece.
    Type: Grant
    Filed: January 23, 1979
    Date of Patent: October 14, 1980
    Assignee: Toyo Kogyo Co., Ltd.
    Inventors: Toshiro Yagi, Junichi Yamamoto, Hideo Kohara